US1023090A - Pneumatic cleansing apparatus. - Google Patents

Description

A. E. MOORH'BAD. PNEUMATIG GLEANSING APPARATUS. APPL'IOATION FILED OOTfZIB, 1908.

1,623,090. U v Patented Apu), 1912.

5 SHEETSa-SHEHT l.

iillll |l| un, nimm.

lllmllllll j0u INVENTOR,

AT TORN E Y.

A. B. MOORHEAD. y PNEUMATICI GLEANSING AIvPARATUS.

- APPLIOATION FILED 00T. ga, 1908.

* 5 SHEETS-SHEET 5.

www,

INVENTUR.

ATTQRNEY.

Patented Apr. 9, 1912.

l use `of pneumatlc carpet sweepers or pneu- Lesesaal UNITED STATES Parana onirica.

LBET E. MOOREEAD, 0F SAN FRANCSCO, CALIFORNIA, ASSGNOR TO AMERICAN ROTARY lVALVE COMPANY, 0F CHICAGO, ILLINOIS, .QL CQRPORATIQN 0E ILLINOIS;

PNEUMATIC CLEANSNG APPETUS.

Specification ci Letters Fa'tent.

rasee-ted apr. e, isis.

Application'led October 2e, 190B. Serial No; 459,945.

To all whom it may concern:

Be it known that I, ALBERT E. MoouHnAo, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and'useful Improvements in Pneumatic Cleansing Ap aratus, of which the following is a speci cation.

This invention relates to pneumatic cleansing apparatus, and -it includes means by which such an apparatus is adapted for use .in cleansing, either by suction or by the force of-compressed air, as may be desired; means of cleansing bythe use of both compressed. air and suction at the same time;

means whereby accumulated dust or refuse' may be mixed with and deposited in a body ot' Water and discharged when necessary in a convenient manneuand Without the necessity o opening tanks or manual removal; means by which the water used for scrubbing and conducted from the scrubbing appliances tothe cleansing apparatus can be automatically discharged therefrom into a sewer means by which one or more cleansing appliances and'one or more scrubbing appliances using water can be operated simul` taneously; means by which scrubbing appliances-n-iay be used not only with Water supplied from the cit-y mains, but also in a circulating system with disinfectant liquid, so that, when said disinfectant has been used, lit may be returned to the apparatus and used over agaimand, furthermore, such operation can be carried on simultaneously with the matic cleansing appliances means embracing a receptacle whichcan be used .not only as a receptacle for dust, but also as a compressed air receiver when using air under pressure, together with other features and details of construction in such apparatus, as

l will be hereinafter pointed out.

In the accompanying drawings-Figure 1 is a side elevation of the apparatus; Fig. 2 is a plan view thereof; Fig. 3 is a horizontal section on an enlarged scale of the controlling valve of the air pump; Fig. 4 is a vertical, section thereof; Fig. 5 is a transverse vertical section on the line 5-r5 of Fig. 3; Fig. (i is a transverse vertical section on the line 6 6 of Fig. 3; Fig. 7 is a. transverse vertical section on the line 5-5` of Figr 3; Fig. '8 is a perspective view of the valve, detached from steer parts, the packing bars and rings being omitted; Fig. 9 is a detail perspective view of one of the packing bars; Fig. 10 is a detail perspective view of one of the packing rings; Fig. 11 is a longitudinal vertical section of the receiver; Fig. 12 is a transverse section on the line 12-12 of Fig. l1; Fig. 13 a4 transverse section on the line 1t- 13 Fic'. 11; Fig. 14 is a 'perspective view the casing for the combined agitators and propeliers. i

Referring to the drawing, 1 indicates a rectangular hollow base, which forms both a receiver for containing a body of water and the dust and sweepingscollected by pneumatic sweeping devices used in the system, and also a support for the mechanismsfor producing and controlling the exhaust or compression. Said mechanisms may be actuated either by electricity, steam or otherwise, and are herein shown asv actuated by the' former. Referring to such actuating devices, as shown in the drawings, 2 indicates an electric motor mounted upon one end of the hollow base 1. Upon the shaft of the motor is a pulley 3 around which passes a belt at, which also passes around a large pulley 5l on a transverse shaft 6 carrying a iiy- Wheel 7. The crank 8 of said shaft actuates azpiston 9 reciprocating in the cylinder 10 of an air pump. I Said pump may be used, as desired, either as an aircompressor `to deliverair to the receiver, or as an air-exhaust pump to exhaust the air from said receiver, dependently upon the adjustment of the controlling valve of the air pump.

Formed integral with the casing of the Working cylinder'is a valve 11(Figs. 3 and 4) having a cylindrical valve chamber containing a cylindric, rotary' valve 1Q, these parts constituting a valve for controlling the entrance of -air to audits exit 'from the ends of the pump cylinder. The details ci construction in said controlling valve'constitute p. the subject oi' a separate application, Serial 'horizontal to a vertical position..

Vthrough the eylindric ,ted in said valve and associated parts, the e embrace features as follows: Said easing is provided at its central part with an annular chamber 13, connected by a conduit 11i with the interior of the receiver 1, and at its ends is connected through ports t', 18, with the ends of the pump cylinder. .Said .valve 12 consists of a cylindrical shell provided exteriorly with four annular' and having a central, cylindric surface Q1 arranged to act in connection with a port 22 leading to the central annular chamber 13, anden its ends with eylindric surfaces 23' adapted to act in connection with the cylindric ports l?, 18. rlhe ivalve 12 is also provided two longitudinal grooves 25 in which w ted tivo longitudinal hars 24, arranged metrieally opposite to each other, uli` f are formed Wi h notches 25a, 251 at their intersecting points, so that the outer surfaces ot' the packing' rings are tlush with the outer surfaces oi* the hars.

Thevalre casing is formed with annular 'Water jackets 26, .and also with oil passages 27, terminating over the packing rings Connected vvith one end ot the valve casing by an eibovv 15 Across the interior et' said valve extends diametrieally a partition orweb 31, the

terminal portions of which lie in the same plane but the intermediate portion of which is twisted through halt' a turn. Thus, when the valve is in the angular position shown in `Figs. 3 and si of the drawings, the termi` nel portions of the Web are vert-ical, but the web at the central portion Y, the valve is horizontal and is twisted fr un said central prtion, ,in each direction or The other end the valve, or that adiseent to the inlet oroutlet pipe 1t?, is closed on one side ot the web 31 by an end Wall 30, and provided With an opening 32 at the other side of the web. Said opening 32 is always in communication with the pipe 16. Ad jacent to the closed end oi the valve there are formed in the side Wall thereof, on opposite sides of the web and extending surface 23, two ports 34, and, in like manner, near the partly open end of the valve there are ormedhen opposite sides of the web and extending trouves .19, having therein packing rings 2O,V

and the packing rings 20- through the cylindric surface 23, two portsI 35, 36. 1n its centra-l' part, on which is formed the cylindric surface 21, the valve 1s provided in its side Wall with what is practically a single port 37, although the same is divided by a narrow bridge 3S on which is seated the bar 24 on that side of the valve. Said port 37 is always open to the central annular chamber 13, which latter is connected to the receiver by means of the passage 14. When the valve is in the position sho-wn in Figs. 3 and 4, the cylinder port 17 is lconnected through the annular chamber with the receiver, While the cylinder port 18 is connected through the passage 32 with exhaust.

By means which vill be presently described, the stem of the valve makes a half 4turn with each half' reciprocal-ion of the piston, and the effect is that when, for instance, the piston, moving troni lett to right, and drayving in auf trom the receiver, reaches its extreme right-hand position, the valveWill have been turned through onehalt a revolution, so that the outer end ot the cylinder is now connected with exhaust, and the inner end of .the cylinder connected with the receiver;l Then, upon the return of the piston, air is drawn from the receiver to the inner end of the cylinder and is expelled from the outer end to exhaust, and so on, thus forming a double-acting suction pump 'for drawing air from the receiver and expelling it through the pipe 1G, which then acts as au exhaust pipe.

` The valve stem is given a rotary movement in unison with the reciprocating movemen of the plunger by means of a mitergear t1 upon the transverse shaft 6, meshing with a miter-gear 4t2 upon a longitudinal shaft 43.. Said shaft 43 is connected with the valve stem 29 through the interposition of a clutch 14 which permits the valve to be reversed to Achange the operation of the pump from an exhaust pump to a compressor. For this purpose, the clutch 44 con' sists of two parts that are adapted to be interlocked vvih each other in two diametrically reversed. positions of one of them, and one of which is movable in a direction end Wise of the shaft 113. As shown, said clutch consists ot two clutch members 44a and 44.". The clutch member 44E is secured 'to the outer end of the valve stem 29 and is provided on its end face with a transverse rih adapted to engage u transverse groove in the clutch member 4141. The clutch member 4ta-b is mounted and adapted to slide endwise, Without rotation, on the shaft 4?), so that it may he moved on the shatt toward and from the clutch member 114. A handlevcr 44 is pivoted on a lixed part of the structure, and has a forked end, the arms ot which engage an annular groove, in the clutch member lll-b, in a familiar manner.

'When it is desired to' reverse the operation half a revolution bymeans of a hand-wheel 45 secured to said stem, an the parts of the: clutch are again interloc Ied, so as to conh nectthe valve stem with i. he shaft e3. The valve havingthus been advanced through one-half a revolution; acts in the opposite -manner to that already described, that isy to say, so that each end of the cylinder is in communication with the receiver at the time that the piston is moving toward said end, and the other endfof the cylinder is then connected with exhaust, so that the cylinder now acts as a compression pump. p

`The passage from the valve into the pipe 16 is adapted to be closed by means of a valve disk 50` carried by a stem 51 which slides in a fixed guidefsleeve- 5l on the elbow t0. Upon the outer end of said 'stein 51 is secured a cylindrical vpiston 52 which slides in a cylinder 53 formed on the elbow 15` The inner end of said cylinder is closed by ay head on which is formed the guido sleeve 51a. Said valv'e disk 50 is normally held in closed position by means of a helical spring 54 which acts to press it toward its seat surrounding the o en end of the valve casing. A disk 55 'o felt surrounds the stem 51 and is interposed between the outer side of the valve disk 50 and the inner end of the guide-sleeve 51*l to cushion the impact of the valve against. the .ia-pid end of said guide-sleeve. In order to check the too rapid motionr of the valve, there is formed in the side of the cylinder 52- a vent 56, which is adapted to allow the air to escape slowly from or to pass slowly into the cylinder,

and, for the purpose of regulating the rate of flow at 'which itcan so pass, seid vent is adjustably closed by inea-lis of a pivoted door 57. It is necessary to limit the amount of air which is drawn into ltliepurnp when using it es a compressor, for if the full volume of air were drawn into the cylinder, the power required to com ress the entire voluineof air 'so' adniitte might be' too great. In order to so limit the amount of air thus admitted, this valve is so arranged that its closing movement `Will be arrested when the vulve disk is at a short distance from its scat, and for this purpose set nuts 58 are applied to the Velve'st-ern vin contact with the outer face of the piston 52. W'hen the pumppis used. as al compressor, the air being then drawn into the pump cylinder through the pipe 16, the valve disk 50 will assunie-a position as close to the seat as permitted by thesaid setnuts. 4

Now referring to the vtentures of construction in the apparatus by which dust and refuse collected by vacuum operated cleansing devices and returned to theapparatus may be mixed with and deposited' in a bodyx'df water contained in the receiver, these parts? are made as follows: The inlet end of the receiver'is provided with an inlet passage A casing 6l connecting the elbow, with an inlet pipe 65 which leads to the receiver from the various arts or" the building in which the Weuinatic cleansing devices are to be used. ithin` the receiver 1, adjacent'to its inlet' end, is located a cylindric shell or casing 69, which is arranged horizontally and transversely of the receiver, open at its ends and perforated' or apertured in its lower part, as indicated at 80. Said casing will be so arranged-with respect to the water level in the receiver, that the casing will be nearl or Wholly. submerged, and therefore fully or nearly iilled with vdater. To the lower Harige 61 of the elbow 62 is bolted s flange A 66 formed upon a centrally arranged tubu# lar member 67, attached to the central part of the casing 69, and extending at right 'angles to the saine. The open ends of said shell 69 are located near the inner surfaces of the sides of the receiver, While the central member 67 extends longitudinally of the receiver, and the flange 66 on its outer end is secured to the liange 6l Within the inlet opening in the end of the receiver. In said cylindric casing 69 are located aplurality of rotative agitator blades TO carried by a transverse, horizontal shaft 7l., which ex! tends centrally through said casing and rc3 tates in lbearings 72 mounted upon the sides of the receiver. Said shaft is provided outn side of the receiver with a pulley 73 driven by a belt 74 that is trained around. a pulley 7 5 upon the shaft of the electric motor. "When in operation, the agitator blades Jass through or operate in the water contained in said casing. The agitator blades 70 are referably arranged obliquely, with the blades or" the alternate annular sets inA reversed relation, so that, While the blades of `cach annular set actlike propeller blades to move cr impel the water in the casing in a direction endwise of the same, the blades of adjacent sets will act in opposite direction, this construction being used to increase the agitation of the water resulting from the rotation oi' the blades. As the airis drawn into the receiver from the pipe 65, it enters the central part ofi the casing 69, and passing in both directions from its center toward its o )en ends )asses from the latter into the air space in the up-A per part oit' the receiver. The effect of the agitator blades, when rotated, is to continually agitato the Water, and, bring it into intirnate contact with the air drawnjin lfrom' the suction pipe in the forni of drops or spi-ey. The :tir is thereby thoroughly cleansed oi dust and solid refuse, 'which lutter is mixed with end deposited vin the fc ter und accumulates in the bottom o the receiver. c

lt is necessary from time to time to discharge from the receiver the water therein when the latter becomes unduly ludened with dust und refuse separated from the air. To eect this, water from s. suitable source of supply is admitted into e, pipe 59 extending horizontally of the receiver, Within the seme. Suid pipe is shown es extending through the end wall of the receiver, :it the outlet end of the lutter, und ns supported by e. bracket 7G from the tcp' of the receiver. To said pipe 59 ere connected depending flexible tubes 77 of rubber or the like und to the lower end of euch of said tubes is connected s rotary sprinkler 78. Euch sprinkler 78 consists of u plurality of hollow urine, attached to and adict-ing from hollow hub, mounted to rotute ou u terminal metal piece on the lower end of .thc flexible tube, seid arms having laterally directed discharge or iet openings T9. The o't` water issuing from said jet ope-iings opere-te by reaction to produce rotative motion in the'urms of the sprinklers, in u well known manner. Suid sprinklers cre located neerthe bottoni of the receiver, so that they are. immersed in the body of water therein contained. lllhen water under pressure is admitted to said pipe it emerges with considerable force through the jet openings T9 ot the sprinklers, thereby not' only producing rotary motion in the sume, but acting to thoroughly ugitute 'the water and stir up the mud or deposits in thc bottoni ot the receiver. This agitation of the water und mud is increased by the shaking motion imparted to the flexible hose itself from the back pressure of the jets of water issuing from the jet openings T9. The pipe D9 is also provided with depending branch pipes Sl.. thc lower ends ot' which are provided with jet openings or nozzles directed down 'urdly und toward the discharge end of the contuincr. The receiver is provided at such discharge end with e discharge out` let 9 P, located et the level ot' the bottom Well of the scid receiver for the discharge of the mud or the muddy water theretrom.

The bottoni well ollthe receiver is preterubly sloped or inclined toward said outlet, in order to facilitate the drainage of water from thc receiver'. A discharge pipe lili will be connected with scid outlet 94, und will lend to n sewer oiothcr lace of discharge.

The apparatus is designed to `be used in connection with vacuum operated scrubbing; u p pliunccs of that hind in which water used for cleansing' is drawn from u. floor which is scrubbed through the "fiction of' the v-.icuiun created pump is acting as an exhcust pump to proof the conduit 83, the pl unfrei' in the pipe G5, when the nir duce s, partiel vacuum in the receiver. lu

such cese the continued operations of scrubbin@l Iand drawing in the water will result in the accunuilution'oi wat/er in the receiver, und, it such accumulation be ellowed to unduly continue, the water will fill the receiver and will rise into the pump cylinder. To avoid the possibility of this tslringplece, there is provided a liquid delivery pump embracing :i pump-cylinder 82 attached to the side wall of the receiver and communicating with the interior oli' the same by a conduit 83 having a depending branch 84 and un upwardly extending brunch 85 ;.the lat-ter having an opening at its upper end adapted to be closed by a valve 86. Said valve 1s operated by a handle @Tutt-ached to the upper end of a valve stein valve and extends upwardly through the top Wall of the receiver. In said pump cylinder reciproca/ted a plunger S8 connected by u rod 89 withu crunk-pin 90 carried by the transverse she't't il. The discharge opening of the pump cylinder is connected by c pipe 91 with the casing of a check-valve 92 und the lat-ter is connected with a pipe 93 with which is connected two brunch pipes 9G and Sl-la. The pipe 9d leeds to the waste pipe @alb und is provided with u hand-operated valve 94. The branch 96 is provided with e hand-operated vulve 95 und is connected with distributing pipes that leed to various points in the building: ln the ordinary operation of thc apparatus, cept as hereinafter described, thc vulve S6 is kept open with the cliect that. so long :is the level of the water in the receiver remains below the top of the conduit S3, no action ci the liquid pump takes place, but. when the level ot' the water in the receiver rises, by the -zufcun'iulzition due to scru'i 'dup'. above the extendingr brunch 85 8S pumps out u, part ot the water and discharges it through the check-vulve 92 und into the sewer.

lt is sometimes desirable to distribute u disinfectant liquid within a building. For this purpose the reservoir is lillcd through the pipe 59 with the disinfectant liquid to u sutlicient level as is indicated in Fig. l2. The vulve SG is then closed, the vulve 94 is closed and the vulve D5 in the pipe 96 is opened. lli/'hen the pump 8S is put into operation, the disinfecting liquid is drawn from the receiver through the open depending brunch S- ot the conduit 83 und is forced through the pipe 96, `from which it will be carried through the distributing pipes to various points in the building.,r where it is desired to use the suine. Such disintectinu' liquid, utter being used on floors und the lil;e,.1nuy be drawn up or collected by the use of suction devices which ere placed in communication with pipes in the buildin', that are connected with the top of the upwardly that is attached to the nessuno 'return pipe 65. The disinecting liquid rei of supply of compressed air such as a sepawith distributing rate air pump and connected with the' pipe 98. Said pipe 97 is controlled by a ha11dop erated valve 98. By this means com ressed air can be supplied when desiredto t e pipe 96, Whicln'asv before stated, ,is connected pipes leading to various parts o'f the building.

'99 indicatesv a pipe connected with the pipe 96 and supplied with Water from a city main. Said pipe 99 is controlled by a valve 100. A pi e 101, controlled by a. valve 102 connects4 tie pipe 9 6 with the pipe 65.v

.After distributing a disinfectant liquid, or plain water, from the pipe 99 through the pipe 96 andthe distributing pipes connected therewith, it will be necessary to thoroughly 'dry vthe pipes containing the liquid, in orderthat if, on the next o ration, compressed air be delivered throug'i the same pipes, no water may be thereby discharged upon the lioors, furniture or other objects. To eliect this result, each time that the pipe 96 has been used for distributing disinfectant liquid or water, the valves 98 and 100 are closed and the valve 102 is opened and the air-pump put in operation as a suction pump. The e'ect being to draw air bach:`

-Ward through the pipe 96, and pipe 101 tothe receiver, thus thoroughly drying said pipe 96 and the distributing pipes by means of the. air drawn backwardly through the same. 'I p The pipe 96 constitutes the ipe through which compressed air will he delivered when the same is desired for use in cleaning such objects as can not well be cleaned by the use of vacuum devices. For using compressed air, the water will be discharged from the receiver and the valve of the air pump reversed, so that said air pump will operate to deliver air to said receiver. The

'alr compressed in the receiver will then be allowed to pass from the same through the pipes and 101 tothe pipe 96 and delivered from the same through the distributing pipes to desired points in the building. The' Vvalve 95 in said pipe 96 at this time will be closed and the valve 102 open. When water from the city mains is to be used for cleansing, the valves 95 and 102 will be closed,l

and the valve 100 in the water supply pipe 99, opened, thus admitting water instead of.

compressed air to the pipe 97 for distribution to the different parts of the building. Atthis time the air pump ma be operated as an exhaust pump, so that t e Water used may be sucked yn by vacuum operated cleansing or scrubiiing devices andA drawn back into the receiver through the return pipe 65.

If air be supplied to the pipe 96 from the pipe 97,- receiving its supply of air under pressure from a separate air-pump or some other-source of supply, the compressed air will be distributed to the various parts of the building through the distributing pipes connected withsaid pipe 96, and the dust dislodged from the objects being cleansed by the action of the compressed au', may be`75 v drawn up or collected-by vacuum operating cleansing devices, connected With the return pipe 65, and returned thereto to the receptacle of the apparatus;l the air-pump in. this operation being operated to exhaust the air from the receiver, and the' valves 95 and 102 being closed.

By the employment of the several features and combinations of parts hereinbefore-described, I am enabled to obtain results and advantages as follows: By reason ofthe employment of an air pump provided with a valve which is reversible so that the pump is convertible into either an exhaust pump or a compressor, the apparatus may be used in connection .with cleaning devices operating either by suction or by air-press sure. By the use of theair'pump acting to exhaust air from the receiver, in connection with a pipe furnishing air under pressure from a separate source ot' air supply, air

under pressure may be supplied for the purpose o dislodging dust from articles by the action of an air blast While at the same time, air may be exhausted from pipes with which vare connected cleaning devices that are op By the connection of a Water supply pipe 115 with the pipe leading to theJ places to be cleaned, in connection Awith the receiver and air-pump when operating as anv exhaust pump, Water used for scrubbing may be re ,turned to the apparatus through the ref turn ,pipe connected with the receiver, so that vacuum operated cleaning devices and scrubbing app iances can be used simultaneously. By the use-of the liquid pump and its delivery pipe, in connection withv the air pump acting asan exhaust pump, a disinfecting liquid can be' delivered to various points in a building, and suchr liquid infecting fluid from the saine to. the dis-d tributing pipe. Moreover, theeinployment of a receiver adapted tocoutam a body of water, together with an air pump adapted to compress the air into the receiver, and also exhaust air therefrom, and me us for mixing the dust with the Water in the receiver and for discharging the water therefrom when desired, enables the same apparatus to be used at one time for furnishing air under pressure to cleansing devices and at another time to receive and dispose of the dust and dirtkgathered by the action of vacuum operated cleaning devices.

T he features of construction herein shown and described, in connection with. the air pump, constitute the subject of the application, Serial No. 623,293, hereinbeforeA referred to, tiled as a division of this application.

rl'he features herein illustrated and described, whereby accumulated dust or refuse may be mixed with and deposited in the body of Water contained in the receiver of the apparatus and said Water and dust or refuse may be removed or discharged from said receiver, constitute the subject of a separate application, Serial No. 640,967, filed July 28th, 1911, as another division of this application.

The features of construction Aherein illustrated and described, embracing means for supplying to the apparatus water or air, or both, from sources of supply separate from the pumps illustrated as part of the apparatus, constitute the subject-matter of a separate application, Serial No. 662,088, tiled November 24:, 1911, as still another division of this application.

It is to he understood that an apparatus embodying the general features of construction hereinbefore set forth maybe variously modified Without departure from my invention-aud l do not, therefore, desire to be limited to the specific features of construction illustrated in theiaccompanying drawings, except so f ar as the saine may be specifically claimed in the appended claims.

I claim as my invention 1. ln a pneumatic cleaningv apparatus, the' 'combination of receiver, a pump connected with the receiver provided, with a reversible controlling; valve, and adapted to either exhaust air from or deliver air to 2. ln a `puclimatic cleansing apparatus;

the combination of receiver, an air putt-ip connected With the said. receiver, a return. pipe connectedwith the inlet of said receivcr, means for supplying Water to said receiver, a liquid pump having its inlet passage connected with the receiver, a de livery pipe 'leading from the discharge passage of said. liquid pump', an means for actuating said. air and liquid. pumps.

In a pneumatic cleansing appara-tus, the combination of a receiver, an air pump connected With the upper part of the ceiver, an air pipe connected with the receiver, a liquid pump having its inlet passage connected with the lower part of the receiver, a delivery pipe leading from said liquid pump, a waste pipe leading from said liquid pump, valves in said delivery waste pipes, and means for actuating said air and liquid pumps.

Ll. In. a pneumatic cleansing apparatus,

the combination of a receiver, an

liaust pump connected with the top of the receiver, a return pipe cennect'ed with inlet of the receiver, a liquid pump for removing surplus water from the receiver, a Waste pipe leading from the outlet of said liquid pump, and means for actuating said air and liquid pumps.

5; In a pneumatic cleansing apparatus, the combination of a receiver, an airx e2:-

haust pump connected with the top partot the receiver, a return pipe connected with the inlet of the receiver, a liquid pump f discharging surplus water from the i'eeei. si., a delivery pipe leading from. the outlet et said liquid pump, a Waste pipe leading; from the. outlet of said liquid pump, valves in said4 delivery and Waste pipes, and lor actuating,- said air and liquid pumps.

(l. In a pneumatic cleansing apparatus, the combination of a receiver, an exhaust pump connected therein" h., a return pipe connected with. the la: .inlet of therceeiver, or 0removing surplus iva-ter a liquid pump il: from the receiver, 'said pump having au inlet passage provided. with vertically separated inlet openings, and a valve for opening and closing the uppermost. of said inlet openings.

7. ln a pneumatic cleansing apparatus, the combination of areceiver, an air-pump connected with said receiver, provided withl a reversible controlling valve, and adapted to either exhaust air from or deliver' 'i' to said receiver, a return pipe connect with the outlet of said' receiver, a liquid pump inmenso4 A. 7

for removing Water from said receiver, a In testimony whereof I have hereunto set delivery pipe leading from the outlet of my hand in the presence of two subscribing 10 aild liquid pump17 a pipe connecting said Witnesses.

e ivery pipe Wit said return pipe, a valve 5 in said connecting pipe, a valve in said de- ALBERT E' MOORHEAD'.

livery pipe between the outlet of the liquid .,Witnesses:

I pump and the connecting pipe, and means .ff FRANCIS M. WRIGHT,

for actuating said air and liquid pumps. D. B. RIoHARD's.

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